Control method, system and device of heat pump hot water system and storage medium

Abstract

The present application relates to a kind of control method, system, device and storage medium of heat pump hot water system.The control method of heat pump hot water system is by monitoring the water consumption and set temperature of domestic water equipment and heating equipment in real time, system can accurately calculate the required medium flow, to effectively utilize the supply capacity of heat pump, avoid resource waste.In addition, according to actual demand, automatically adjust flow, priority to meet the domestic water demand, while taking into account the heating demand, ensure the efficient use of resources.At the same time, in the case of meeting the supply demand of the first water tank, the system will adjust the opening of valve assembly, optimize flow distribution, ensure that heat pump runs in the best working condition to improve energy efficiency, and by calculating the heat shortage and controlling the heating assembly of the second water tank, ensure that heating equipment can obtain enough heat when needed, so as to improve the thermal efficiency of the overall system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat pump hot water control, in particular to a heat pump hot water system control method, system, device and storage medium. BACKGROUND

[0002] Heat pump technology is a technology that uses low-grade heat sources (such as air, soil or water) to transfer heat energy to high-grade heat sources through the principle of reverse Carnot cycle. Heat pump equipment can effectively extract heat from the environment and use it to heat water or indoor air through the coordinated action of components such as compressors, evaporators, condensers and expansion valves. Currently, heat pump technology is also increasingly used to produce domestic hot water and for heating. However, the inventors have found that in the process of daily use by users, the prior art has the problem of low utilization rate of heat resources. SUMMARY

[0003] Therefore, it is necessary to provide a heat pump hot water system control method, system, device and storage medium that can improve the utilization rate of heat resources.

[0004] To achieve the above-mentioned purpose, in one aspect, the present application provides a heat pump hot water system control method, applied to a heat pump hot water system, the heat pump hot water system comprising an outdoor unit and an indoor unit; the indoor unit comprising a valve assembly, a first water tank for supplying a domestic water device, and a second water tank for supplying a heating device; the first water tank and the second water tank are both in communication with the outdoor unit through the valve assembly;

[0005] The control method comprises:

[0006] Obtaining a first water consumption and a first set temperature of the current domestic water device, and a second water consumption and a second set temperature of the current heating device;

[0007] Obtaining a first current temperature of the first water tank and a second current temperature of the second water tank;

[0008] Determining a first medium flow required by the first water tank according to the first water consumption, the first set temperature and the first current temperature;

[0009] Determining a second medium flow required by the second water tank according to the second water consumption, the second set temperature and the second current temperature;

[0010] Obtaining a supply upper limit flow of the outdoor unit, and determining whether the outdoor unit can currently meet the supply requirement of the first water tank and the total supply requirement according to the supply upper limit flow, the first medium flow and the second medium flow;

[0011] In the case of meeting the supply requirement of the first water tank and not meeting the total supply requirement, controlling the opening degree of the valve assembly to make the flow to the first water tank meet the first medium flow.

[0012] The heat deficiency is determined according to the supply upper limit flow rate, the first medium flow rate and the second medium flow rate, and the heating assembly arranged in the second water tank is controlled to operate according to the heat deficiency.

[0013] In one of the embodiments, a coil pipe is arranged in the first water tank, and the coil pipe is communicated with the outdoor unit through the valve assembly.

[0014] In the step of determining the first medium flow rate required by the first water tank according to the first water consumption, the first set temperature and the first current temperature, the first medium flow rate is obtained based on the following formula:

[0015]

[0016] Wherein, ε is the heat exchange efficiency; Q1 is the first water consumption; ρ is the density of water; T set1 is the first set temperature; T curr1 is the first current temperature; C p is the specific heat capacity of water; C ph is the specific heat capacity of the medium; T h is the current temperature of the medium; and m is the first medium flow rate.

[0017] In one of the embodiments, the step of determining the second medium flow rate required by the second water tank according to the second water consumption, the second set temperature and the second current temperature comprises the following steps:

[0018] The heat required for heating is determined according to the second water consumption, the second set temperature and the second current temperature.

[0019] The medium temperature of the medium flowing out of the valve assembly is obtained, and the second medium flow rate is determined according to the heat required for heating and the medium temperature.

[0020] In one of the embodiments, the step of determining whether the outdoor unit can currently meet the supply requirement of the first water tank and the total supply requirement comprises:

[0021] In the case that the sum of the first medium flow rate and the second medium flow rate is less than the supply upper limit flow rate, it is determined that the outdoor unit can currently meet the total supply requirement;

[0022] In the case that the first medium flow rate is less than the supply upper limit flow rate, and the sum of the first medium flow rate and the second medium flow rate is greater than the supply upper limit flow rate, it is determined that the outdoor unit meets the supply requirement of the first water tank, but does not meet the total supply requirement;

[0023] In the case that the first medium flow rate is greater than the supply upper limit flow rate, it is determined that the outdoor unit does not meet the supply requirement of the first water tank, and does not meet the total supply requirement.

[0024] In one of the embodiments, the method further comprises the step of:

[0025] In the case that the supply demand of the first water tank is not satisfied, the heating assembly arranged in the first water tank is controlled to operate, and the heating assembly arranged in the second water tank is controlled to operate.

[0026] In one of the embodiments, the method further comprises the steps of:

[0027] In the case that the total supply demand can be satisfied by the outdoor unit at present, the opening degree of the valve assembly is controlled so that the flow to the first water tank satisfies the first medium flow, and the flow to the second water tank satisfies the second medium flow.

[0028] In one aspect, the embodiments of the present application provide a heat pump hot water system, comprising a controller, an outdoor unit and an indoor unit; the indoor unit comprises a valve assembly, a first water tank for supplying a domestic water device and a second water tank for supplying a heating device; the first water tank and the second water tank are both communicated with the outdoor unit through the valve assembly; the controller is electrically connected with the valve assembly;

[0029] The controller executes the steps of the above method.

[0030] In one of the embodiments, the heat pump hot water system further comprises a first heating assembly arranged in the first water tank and a second heating assembly arranged in the second water tank; the first heating assembly and the second heating assembly are both electrically connected with the controller.

[0031] In one aspect, the embodiments of the present application provide a control device of a heat pump hot water system, which is applied to a heat pump hot water system; the heat pump hot water system comprises an outdoor unit and an indoor unit; the indoor unit comprises a valve assembly, a first water tank for supplying a domestic water device and a second water tank for supplying a heating device; the first water tank and the second water tank are both communicated with the outdoor unit through the valve assembly;

[0032] The control device comprises:

[0033] A first acquisition module is configured to acquire a first water consumption and a first set temperature of the current domestic water device, and a second water consumption and a second set temperature of the current heating device;

[0034] A second acquisition module is configured to acquire a first current temperature of the first water tank and a second current temperature of the second water tank;

[0035] A first confirmation module is configured to determine a first medium flow required by the first water tank according to the first water consumption, the first set temperature and the first current temperature;

[0036] A second confirmation module is configured to determine a second medium flow required by the second water tank according to the second water consumption, the second set temperature and the second current temperature;

[0037] The judgment module is configured to acquire a supply upper limit flow of the outdoor unit, and judge whether the outdoor unit can meet the supply demand of the first water tank and the total supply demand according to the supply upper limit flow, the first medium flow and the second medium flow.

[0038] The valve control module is configured to control the opening degree of the valve assembly to make the flow to the first water tank meet the first medium flow when the supply demand of the first water tank is met and the total supply demand is not met.

[0039] The heating control module is configured to determine a heat shortage according to the supply upper limit flow, the first medium flow and the second medium flow, and control the heating assembly arranged in the second water tank to operate according to the heat shortage.

[0040] In another aspect, the present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, wherein the computer program is configured to execute the steps of the above method when running.

[0041] One of the above technical solutions has the following advantages and beneficial effects:

[0042] The control method of the heat pump hot water system can accurately calculate the required medium flow by monitoring the water consumption and set temperature of the domestic water equipment and the heating equipment in real time, thereby effectively utilizing the supply capacity of the heat pump and avoiding resource waste. In addition, the flow can be automatically adjusted according to the actual demand, the domestic water demand is preferentially met, and the heating demand is also considered, thereby ensuring efficient use of resources. Meanwhile, when the supply demand of the first water tank is met, the system adjusts the opening degree of the valve assembly to optimize the flow distribution, ensures that the heat pump operates in the best working state to improve the energy efficiency, and calculates the heat shortage and controls the heating assembly of the second water tank to ensure that the heating equipment can obtain sufficient heat when needed, thereby improving the overall heat efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the accompanying drawings needed to be used in the embodiment or related art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0045] Figure 1 a schematic flow chart of the control method of the heat pump hot water system in an embodiment;

[0046] Figure 2A schematic structural block diagram of a heat pump hot water system in an embodiment;

[0047] Figure 3 A schematic flow chart of a step for determining whether the outdoor unit can meet the supply demand of the first water tank and the total supply demand in an embodiment. DETAILED DESCRIPTION

[0048] For the purpose of understanding the present application, the present application will be described in more detail with reference to the attached drawings. The embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0050] In the following description, the suffix used for an element, such as "module", "part", or "unit", is merely intended for easy description of the present application, and does not have specific meaning or function. Thus, "module" and "part" can be used interchangeably.

[0051] It can be understood that "connection" in the following embodiments means "electrical connection", "communication connection", etc. if the connected circuit, module, unit, etc. have transmission of electrical signals or data between each other.

[0052] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" or "including", or the like, means the stated features, integers, steps, operations, components, parts or the like, but does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or the like.

[0053] In existing application scenarios, the heat pump hot water system has a situation of insufficient heat pump power, such as too low ambient temperature, too low host power itself, sudden surge of heat equipment, etc. Taking the case of too low host power itself, that is, the host power itself can meet most scenarios, but not extreme scenarios, or the relatively high cost performance of the low host power, the heat pump hot water system containing such low host power still cannot meet daily needs in a few cases, and the control method provided by the present application can solve the above problems.

[0054] In one embodiment, asFigure 1 As shown, a control method of a heat pump hot water system is provided, which is applied to a heat pump hot water system, such as Figure 2 As shown, the heat pump hot water system comprises an outdoor unit 10 and an indoor unit 20; the indoor unit 20 comprises a valve assembly 201, a first water tank 202 for supplying a domestic water device 1, and a second water tank 203 for supplying a heating device 2; the first water tank 202 and the second water tank 203 are both communicated with the outdoor unit 10 through the valve assembly 201;

[0055] The outdoor unit is responsible for absorbing heat from the environment and transferring the heat to the indoor unit through a heat pump cycle. The valve assembly is used to adjust the flow rate of the medium flowing to the first water tank and the second water tank. The medium can be refrigerant or water. In a specific example, the medium is water, and the indoor unit delivers heated hot water to the first water tank and the second water tank through the valve assembly. The first water tank is used to store and supply hot water required by the domestic water device, such as shower, faucet, etc. The second water tank is used to store and supply hot water or circulating water required by the heating device, which can be a floor heating, radiator, air disc, etc.

[0056] Specifically, the domestic water in the first water tank is municipal water pipe, which is heated by the medium flowing into the first water tank in the form of heat exchange, and the medium flowing into the first water tank does not flow to the domestic water device. The medium provided by the outdoor unit flows in the heating device. In an example, the circulation path can be that the heating device draws hot water from the second water tank to provide indoor heating, and then flows back to the second water tank. When the water temperature in the second water tank drops to a set threshold, the water flow is directed to the outdoor unit, which absorbs heat from the environment and transfers it to the water, which is heated and then returned to the second water tank. It should be noted that the second water tank can also be connected to the municipal water pipe to supplement part of the water source.

[0057] The control method comprises:

[0058] S110, obtaining a first water consumption and a first set temperature of a current domestic water device, and a second water consumption and a second set temperature of a current heating device;

[0059] The current domestic water device refers to the domestic water device currently in use, and the current heating device refers to the heating device currently in use. The first water consumption represents the water consumption of the domestic water device in a certain period of time. The second water consumption represents the water consumption of the heating device in a certain period of time. The first set temperature represents the user's desired domestic water temperature, and the second set temperature represents the user's desired heating water temperature, which can be obtained according to the user's set indoor temperature, such as a preset indoor temperature and heating water temperature relationship diagram.

[0060] Specifically, the first water consumption and the second water consumption can be monitored by a flow sensor, which can be arranged at the water outlet of the water tank, so as to obtain the first water consumption and the second water consumption, respectively. The first set temperature and the second set temperature can be obtained by capturing the temperature data in the controller.

[0061] S120, obtaining a first current temperature of the first water tank and a second current temperature of the second water tank;

[0062] The first current temperature is the current temperature of the water in the first water tank, and the second current temperature is the current temperature of the water in the second water tank.

[0063] Specifically, the first current temperature of the first water tank and the second current temperature of the second water tank can be obtained by a temperature sensor. In an example, a plurality of temperature sensors can be arranged at different positions of any water tank, and the collected data at different positions can be fused to obtain the first current temperature and the second current temperature. For example, the average value after invalid data is removed can be taken as the first current temperature and the second current temperature.

[0064] S130, determining a first medium flow required by the first water tank according to the first water consumption, the first set temperature and the first current temperature;

[0065] The first medium flow represents the flow of medium (such as hot water or refrigerant) required to be provided to the first water tank to meet the first water consumption and the first set temperature, and its unit can be liters / minute.

[0066] Specifically, the first water consumption, the first set temperature and the first current temperature can be processed by any means in the art to determine the first medium flow required by the first water tank. In an example, the heat required to heat the water in the first water tank from the first current temperature to the first set temperature can be calculated first. Then the heat requirement is converted into the required medium flow. In order to ensure the stability and reliability of the system, a certain safety margin can be set when determining the first medium flow. The size of the safety margin depends on the specific design of the system and the use requirements of the user, which will not be described in detail here. In another example, an empirical formula or chart based on experimental data or engineering experience can be used to quickly estimate the medium flow. The parameters such as the first water consumption, the first set temperature and the first current temperature are substituted into the empirical formula to calculate the required medium flow. In another example, a thermodynamic model is established, and the parameters such as the first water consumption, the first set temperature and the first current temperature are input into the model to obtain the first medium flow.

[0067] S140, determining a second medium flow required by the second water tank according to the second water consumption, the second set temperature and the second current temperature;

[0068] The second medium flow rate represents the flow rate of the medium (which can be hot water, steam or refrigerant) that needs to be provided to the second water tank in order to meet the second water consumption and the second set temperature, and the unit can be liters / minute.

[0069] Specifically, the heating required heat can be determined according to the second water consumption, the second set temperature and the second current temperature; the medium temperature of the medium flowing out of the valve assembly is obtained, and the second medium flow rate is determined according to the heating required heat and the medium temperature. In the case that the hot water temperature of the second water tank is insufficient, especially at the time when the heating device is started, new hot water needs to be injected into the water in the second water tank to make the water temperature of the second water tank meet the second set temperature. This step uses the second water consumption to calculate the second medium flow rate, and the obtained value is the minimum flow rate required to meet the second set temperature. It should be noted that the medium temperature of the medium refers to the temperature of the medium flowing out of the valve assembly.

[0070] According to the second water consumption, the second set temperature and the second current temperature, the heating required heat to the second set temperature is determined, which can be calculated by a thermodynamic formula, and the medium temperature of the medium flowing out of the valve assembly can be measured by a temperature sensor. In the case that the required heat and the medium temperature are known, the second medium flow rate can be determined.

[0071] S150, obtaining the supply upper limit flow rate of the outdoor unit, and determining whether the outdoor unit can meet the supply requirement of the first water tank and the total supply requirement according to the supply upper limit flow rate, the first medium flow rate and the second medium flow rate;

[0072] Specifically, the supply upper limit flow rate of the outdoor unit is usually determined by the technical parameters provided by the equipment manufacturer. This flow rate represents the maximum flow rate that the outdoor unit can provide under the best working conditions. This data can be obtained by referring to the technical manual or product specification of the outdoor unit, or by obtaining real-time data through the control system or monitoring system of the equipment.

[0073] S160, in the case that the supply requirement of the first water tank is met and the total supply requirement is not met, controlling the opening degree of the valve assembly so that the flow rate flowing to the first water tank meets the first medium flow rate;

[0074] Specifically, the valve assembly can be composed of multiple valves, and the specific composition and setting position are not limited here, as long as it can control the flow rate flowing to the first water tank and the second water tank.

[0075] S170, determining the heat deficiency according to the supply upper limit flow rate, the first medium flow rate and the second medium flow rate, and controlling the heating assembly arranged in the second water tank to operate according to the heat deficiency.

[0076] Specifically, the actual heat supply can be determined based on the upper limit flow rate and the first medium flow rate, while the heat demand can be known from the second medium flow rate. Then, the heat deficit can be calculated based on the actual heat supply and demand. Furthermore, the control logic for the heating component is set according to the magnitude of the heat deficit. For example, if the heat deficit is greater than a certain threshold, the power of the heating component is activated or increased; if the heat deficit is less than or equal to 0, the heating component remains off or its power is reduced.

[0077] The aforementioned control method for the heat pump water heating system monitors the water consumption and set temperature of domestic water and heating equipment in real time. The system can calculate the required medium flow rate, thereby effectively utilizing the heat pump's supply capacity and avoiding resource waste. Furthermore, it can automatically adjust the flow rate according to actual needs, prioritizing domestic water demand while also considering heating needs, ensuring efficient resource utilization. Simultaneously, while meeting the supply needs of the first water tank, the system optimizes flow distribution by adjusting the opening of valve components, ensuring the heat pump operates at its best to improve energy efficiency. Moreover, by calculating heat deficit and controlling the heating components of the second water tank, it ensures that the heating equipment can obtain sufficient heat when needed, thereby improving the overall system's thermal efficiency.

[0078] In one embodiment, a coil is provided in the first water tank; the coil is connected to the outdoor unit via a valve assembly;

[0079] In the step of determining the required first medium flow rate for the first water tank based on the first water consumption, the first set temperature, and the first current temperature, the first medium flow rate is obtained based on the following formula:

[0080]

[0081] Where ε is the heat exchange efficiency; Q1 is the initial water consumption; ρ is the density of water; T set1 Set the first temperature; T curr1 The first current temperature; C p C is the specific heat capacity of water. ph T is the specific heat capacity of the medium. h is the current temperature of the medium; m is the first medium flow rate. The current temperature of the medium specifically refers to the temperature of the medium inside the coil. In one example, if the medium is water, then C in the formula... p and C ph Remove at the same time.

[0082] Specifically, the transmission medium from the outdoor unit is delivered to the coils and the water in the first water tank is heated through heat exchange.

[0083] In one embodiment, such as Figure 3As shown, the step of determining whether the outdoor unit can currently meet the supply demand of the first water tank and the total supply demand includes:

[0084] S310, in the case that the sum of the first medium flow and the second medium flow is less than the supply upper limit flow, determining that the outdoor unit can currently meet the total supply demand;

[0085] Specifically, in the case that the outdoor unit can currently meet the total supply demand, the opening degree of the valve assembly is controlled so that the flow to the first water tank meets the first medium flow and the flow to the second water tank meets the second medium flow.

[0086] S320, in the case that the first medium flow is less than the supply upper limit flow and the sum of the first medium flow and the second medium flow is greater than the supply upper limit flow, determining that the outdoor unit meets the supply demand of the first water tank and does not meet the total supply demand;

[0087] S330, in the case that the first medium flow is greater than the supply upper limit flow, determining that the outdoor unit does not meet the supply demand of the first water tank and does not meet the total supply demand.

[0088] In the case that the supply demand of the first water tank is not met, the heating assembly arranged in the first water tank is controlled to operate and the heating assembly arranged in the second water tank is controlled to operate.

[0089] In one embodiment, a heat pump water heating system is provided, comprising a controller, an outdoor unit and an indoor unit; the indoor unit comprises a valve assembly, a first water tank for supplying a domestic water device and a second water tank for supplying a heating device; the first water tank and the second water tank are both communicated with the outdoor unit through the valve assembly; the controller is electrically connected with the valve assembly;

[0090] The controller executes the steps of the above method.

[0091] In one of the embodiments, it further comprises a first heating assembly arranged in the first water tank and a second heating assembly arranged in the second water tank; the first heating assembly and the second heating assembly are both electrically connected with the controller.

[0092] In one embodiment, a control device of a heat pump water heating system is provided, applied to a heat pump water heating system, the heat pump water heating system comprising an outdoor unit and an indoor unit; the indoor unit comprises a valve assembly, a first water tank for supplying a domestic water device and a second water tank for supplying a heating device; the first water tank and the second water tank are both communicated with the outdoor unit through the valve assembly;

[0093] The control device comprises:

[0094] A first acquisition module is configured to acquire a first water consumption and a first set temperature of a current domestic water device and a second water consumption and a second set temperature of a current heating device;

[0095] a second obtaining module, configured to obtain a first current temperature of the first water tank and a second current temperature of the second water tank;

[0096] a first determining module, configured to determine a first medium flow required by the first water tank according to the first water consumption, the first set temperature and the first current temperature;

[0097] a second determining module, configured to determine a second medium flow required by the second water tank according to the second water consumption, the second set temperature and the second current temperature;

[0098] a judging module, configured to obtain a supply upper limit flow of the outdoor unit, and determine whether the outdoor unit can meet the supply requirement of the first water tank and the total supply requirement according to the supply upper limit flow, the first medium flow and the second medium flow;

[0099] a valve control module, configured to control the opening degree of the valve assembly to make the flow to the first water tank meet the first medium flow in the case that the supply requirement of the first water tank is met and the total supply requirement is not met;

[0100] a heating control module, configured to determine a heat shortage according to the supply upper limit flow, the first medium flow and the second medium flow, and control the heating assembly arranged in the second water tank to operate according to the heat shortage.

[0101] The specific limitations of the control device of the heat pump hot water system can refer to the limitations of the control method of the heat pump hot water system in the above, which will not be described here. Each module in the control device of the heat pump hot water system can be realized by software, hardware and a combination thereof in whole or in part. Each module can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division manner.

[0102] In one embodiment, a computer readable storage medium having a computer program stored thereon is also provided, and the computer program is executed by a processor to implement the following steps:

[0103] obtaining a first water consumption and a first set temperature of the current domestic water equipment, and a second water consumption and a second set temperature of the current heating equipment;

[0104] obtaining a first current temperature of the first water tank and a second current temperature of the second water tank;

[0105] determining a first medium flow required by the first water tank according to the first water consumption, the first set temperature and the first current temperature;

[0106] determining a second medium flow required by the second water tank according to the second water consumption, the second set temperature and the second current temperature;

[0107] obtaining a supply upper limit flow of the outdoor unit, and judging whether the outdoor unit can meet the supply requirement of the first water tank and the total supply requirement according to the supply upper limit flow, the first medium flow and the second medium flow;

[0108] controlling the opening degree of the valve assembly to make the flow to the first water tank meet the first medium flow when the supply requirement of the first water tank is met and the total supply requirement is not met;

[0109] determining a heat shortage according to the supply upper limit flow, the first medium flow and the second medium flow, and controlling a heating assembly arranged in the second water tank to operate according to the heat shortage.

[0110] It can be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing units can be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSP Devices), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

[0111] For software implementation, the techniques described herein can be implemented with a processing unit that executes software. The software code can be stored in a memory and executed by a processor. The memory can be implemented within the processor or external to the processor.

[0112] Those of ordinary skill in the art can understand that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those of ordinary skill in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0113] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

[0114] In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the modules is only a logical function division. There can be another division in actual implementation. For example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed interconnections can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0115] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0116] In addition, each of the function units in the embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. When the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application essentially or in other words the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, and various program codes that can be stored in the medium. It should be noted that in this paper, relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to the processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0117] The above is only a specific embodiment of the present application, so that those skilled in the art can understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A control method for a heat pump water heating system, characterized in that, This invention is applied to a heat pump water heating system, which includes an outdoor unit and an indoor unit; the indoor unit includes a valve assembly, a first water tank for supplying domestic water to equipment, and a second water tank for supplying heating equipment; both the first water tank and the second water tank are connected to the outdoor unit through the valve assembly. The control method includes: Obtain the first water consumption and first set temperature of the current domestic water equipment, and the second water consumption and second set temperature of the current heating equipment; Obtain the first current temperature of the first water tank and the second current temperature of the second water tank; Based on the first water consumption, the first set temperature, and the first current temperature, determine the first medium flow rate required for the first water tank; The required flow rate of the second medium in the second water tank is determined based on the second water consumption, the second set temperature, and the second current temperature. Obtain the upper limit flow rate of the outdoor unit, and determine whether the outdoor unit can currently meet the supply demand of the first water tank and the total supply demand based on the upper limit flow rate, the first medium flow rate and the second medium flow rate; When the supply demand of the first water tank is met, but the total supply demand is not met, the opening of the valve assembly is controlled so that the flow rate to the first water tank meets the flow rate of the first medium. Based on the supply upper limit flow rate, the first medium flow rate, and the second medium flow rate, the heat deficit is determined, and based on the heat deficit, the operation of the heating component located in the second water tank is controlled.

2. The control method for a heat pump water heating system according to claim 1, characterized in that, The first water tank is equipped with a coil; the coil is connected to the outdoor unit through the valve assembly; In the step of determining the required first medium flow rate for the first water tank based on the first water consumption, the first set temperature, and the first current temperature, the first medium flow rate is obtained based on the following formula: Where ε is the heat exchange efficiency; Q1 is the first water consumption; P is the density of water; Tset1 is the first set temperature; Tcurr1 is the first current temperature; Cp is the specific heat capacity of water; Cph is the specific heat capacity of the medium; Th is the current temperature of the medium; and m is the flow rate of the first medium.

3. The control method for a heat pump water heating system according to claim 1, characterized in that, The step of determining the required flow rate of the second medium in the second water tank based on the second water consumption, the second set temperature, and the second current temperature includes the following steps: The amount of heat required for heating is determined based on the second water consumption, the second set temperature, and the second current temperature. The temperature of the medium flowing out of the valve assembly is obtained, and the flow rate of the second medium is determined based on the heat required for heating and the medium temperature.

4. The control method for a heat pump water heating system according to claim 1, characterized in that, The steps for determining whether the outdoor unit can currently meet the supply demand of the first water tank and the total supply demand include: If the sum of the first medium flow rate and the second medium flow rate is less than the upper limit of supply flow rate, it is determined that the outdoor unit can currently meet the total supply demand. If the flow rate of the first medium is less than the upper limit of supply flow rate, and the sum of the flow rates of the first medium and the second medium is greater than the upper limit of supply flow rate, it is determined that the outdoor unit meets the supply demand of the first water tank, but does not meet the total supply demand. If the flow rate of the first medium is greater than the upper limit of the supply flow rate, it is determined that the outdoor unit does not meet the supply demand of the first water tank and does not meet the total supply demand.

5. The control method for a heat pump water heating system according to claim 4, characterized in that, It also includes the following steps: If the supply demand of the first water tank is not met, the heating component installed in the first water tank is controlled to operate, and the heating component installed in the second water tank is also controlled to operate.

6. The control method for a heat pump water heating system according to claim 4, characterized in that, It also includes the following steps: When the outdoor unit is currently able to meet the total supply demand, the opening degree of the valve assembly is controlled so that the flow rate to the first water tank meets the first medium flow rate, and the flow rate to the second water tank meets the second medium flow rate.

7. A heat pump water heating system, characterized in that, The system includes a controller, an outdoor unit, and an indoor unit. The indoor unit includes a valve assembly, a first water tank for supplying domestic water to a water supply system, and a second water tank for supplying heating water to a water supply system. Both the first and second water tanks are connected to the outdoor unit via the valve assembly. The controller is electrically connected to the valve assembly. The controller performs the steps of the method described in any one of claims 1 to 6.

8. The heat pump water heating system according to claim 7, characterized in that, It also includes a first heating component located in the first water tank and a second heating component located in the second water tank; both the first heating component and the second heating component are electrically connected to the controller.

9. A control device for a heat pump water heating system, characterized in that, This invention is applied to a heat pump water heating system, which includes an outdoor unit and an indoor unit; the indoor unit includes a valve assembly, a first water tank for supplying domestic water to equipment, and a second water tank for supplying heating equipment; both the first water tank and the second water tank are connected to the outdoor unit through the valve assembly. The control device includes: The first acquisition module is used to acquire the first water consumption and the first set temperature of the current domestic water equipment, and the second water consumption and the second set temperature of the current heating equipment; The second acquisition module is used to acquire the first current temperature of the first water tank and the second current temperature of the second water tank; The first confirmation module is used to determine the first medium flow rate required by the first water tank based on the first water consumption, the first set temperature and the first current temperature; The second confirmation module is used to determine the second medium flow rate required by the second water tank based on the second water consumption, the second set temperature and the second current temperature; The judgment module is used to obtain the upper limit flow rate of the outdoor unit, and determine whether the outdoor unit can currently meet the supply demand of the first water tank and the total supply demand based on the upper limit flow rate, the first medium flow rate and the second medium flow rate. A valve control module is used to control the opening degree of the valve assembly so that the flow rate to the first water tank meets the first medium flow rate when the supply demand of the first water tank is met but the total supply demand is not met. The heating control module is used to determine the heat deficit based on the upper limit flow rate of the supply, the flow rate of the first medium and the flow rate of the second medium, and to control the operation of the heating component located in the second water tank based on the heat deficit.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein the computer program is configured to perform the steps of the method described in any one of claims 1 to 8 when executed.

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